crazymatt007, the good news is that these already *do* exist in the Artemis universe. In the official TSN manual I described some of the USFP's member races thus ". . . they ranged from stone aged amphibians to meditative balloons floating in warm gas giants."
That's on Page 52 of the printed version, which I have in front of me.
The bad news is that while such creatures will be featured in upcoming Artemis stories and novels, and even some mission scripts, they will never be a required part of player interaction. While I agree they would add very slightly to the realism, the cost would be too high.
I want people who run game-mastered Artemis missions to be able to put on some sort of mask or makeup and speak to the players as a member of any of the important alien races.
I don't want to argue the following, but it is true:
The entire concept of races evolved in different star systems developing technologies that could fight each other is astronomically unlikely. Space warfare between different species will probably NEVER happen in the real universe simply because species will be separated by millions of years of technological difference. The very premise of Artemis (and Star Trek, Star Wars, Babylon 5, etc.) is statistically preposterous. But it resonates with us so we suspend our disbelief and indulge.
"Damn the torpedoes! Four bells, Captain Drayton!"
(Likely actual words of Admiral David Farragut, USN, at the battle of Mobile Bay. Four bells was the signal for the engine room to make full steam ahead).